VERIFIED
Frost sensors on both appliances
This is the one place where the refrigerator and the wine cooler agree on the idea behind the code. In both, E4 concerns a frost-related sensor. The details differ.
- Refrigerator (REF36FDFZXNT): “Refrigerator frost sensor failure.”
- Wine cooler: “Upper zone frosting probe: short circuit.”
What the refrigerator manual offers
Very little beyond the code itself. E4 sits in a list with E1 through E7 and a few ice maker codes. The display shows it while the panel is locked, a chime sounds if there are multiple codes, and any button turns the chime off. The code leaves the display once the problem is resolved. No causes, resets or owner checks are given for E4, so the next step is a call to service.
What the wine cooler manual offers
It treats E4 as the short-circuit twin of E3. When it appears, three tics sound, the display flashes the code about every ten seconds, and the on/off key stops the alarm. The text under the table states that a malfunction should go to a service technician.
A note on the word “frost”
Bertazzoni does not describe what a failed frost sensor does to cooling on either appliance, so we leave the effect open rather than guess.
Keep the paperwork handy
The model number on the nameplate decides which manual applies to you, and that matters here because the same code is documented differently on the 36 inch refrigerator and on the wine cooler. If you no longer have the printed manual, the model number is enough for a technician to look up the right entry.
Where else frost sensors appear
- E5: freezer frost (defrost) sensor on refrigerators
- E12: a lower zone frosting probe short on the cooler
Book a frost sensor repair in San Francisco
Call (415) 692-0756 and tell us which appliance shows E4. The model number is on the nameplate.
Model compatibility: Bertazzoni reuses codes across series and model years, so E4 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
